单选题：Consider a file has 100 data blocks. Assume that the file contro

Consider a file has 100 data blocks. Assume that the file control block, the index block(s) are all in memory. Which of the following actions does not require any I/O operations?@[B](1)
A. moving the last block to the beginning, if contiguous allocation method is used
B. moving the last block to the beginning, if indexed allocation method is used
C. moving the last block to the beginning, if linked allocation method is used
D. moving the first block to the end, if linked allocation method is used





A.moving the last block to the beginning, if contiguous allocation method is used
B.moving the last block to the beginning, if indexed allocation method is used
C.moving the last block to the beginning, if linked allocation method is used
D.moving the first block to the end, if linked allocation method is used


答案：B